Initiation of replication occurs at an "origin of replication" site that typically includes an AT-rich region.Initiation benefits from these AT-rich regions because:
A)adenine-thymine pairs are held together by two H-bonds,making them easier to separate during unwinding.
B)the AT-rich region recruits DNA polymerase to begin the process of DNA replication.
C)the AT-rich region recruits topoisomerase to begin the process of DNA replication.
D)GC-rich regions are impossible to replicate because of their strong H-bonds.
E)None of the answers is correct.

Question

Quizplus · Accepted Answer

Adenine and thymine only form two hydrogen bonds, while guanine and cytosine form three hydrogen bonds. This means that the AT-rich region will be more easily separated during the unwinding process needed to initiate replication.

Initiation of Replication Occurs at an "Origin of Replication" Site